ETSI ES 283 003-2007 电信和互联网融合业务及高级网络协议(TISPAN).基于会话初始协议(SIP)和会话描述协议(SDP)的IP多媒体呼叫控制协议第3阶段(版本1.8.0).3GPP TS 24.229(第7次发布)
Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3